My hamster escaped 4 days ago. How to find him & keep him safe?

He could still be alive. Check the cabinets and other low areas that have a lot of hiding places. I recommend to keep the dogs in crates or outside because many dogs would kill and possibly eat a rodent. Almond may not be afraid of the dogs because he is domesticated and has never been hunted. Place some small piles of food out, leave his cage out and open. You may even put out his favorite toys, wheels or rollie ball to encourage him to come out. You may place some flour on the ground in the areas you suspect he may be hiding. Most rodents will run along a wall rather than out in the middle of a room. In the morning, check for prints in the flour. I hope this helps and best of luck!